The discharge of nutrients, phytoplankton and pathogenic bacteria through ballast water may threaten the Cayo Arcas reef system. To assess this threat, the quality of ballast water and presence of coral reef pathogenic bacteria in 30 oil tankers loaded at the PEMEX Cayo Arcas crude oil terminal were determined. The water transported in the ships originated from coastal, oceanic or riverine regi...

Abstract This study considered three different water quality indices (WQIs) for groundwater data collected from the middle-west part of Bangladesh, and quantitative results were justified with globally accepted guidelines. It compared between Canadian WQI Weighted Average WQI, Mierels drinking irrigation purposes, respectively. The revealed that method categorized as ‘fair’ while model showed ‘...

This is the first comprehensive examination of Turyanchay River in Azerbaijan, focusing on water quality (WQ), contamination, and biodiversity at four different locations: Gabala, Agdash, Udjar Zardab. The study analysed nutrient (nitrate, ammonium, phosphate) metal/metalloid (Pb, Cu, Ni, Zn, Mn, Cr, Cd, Fe Al) contamination levels, as well diversity macrozoobenthos river, birds vegetation. che...

Water quality assessment has become a very essential scientific procedure for qualifying water drinking and general purpose use, better public health policy on clean supply. Various tools have been employed to determine the status of systems drinking, industrial use. For this study, index (WQI) recently developed pollution (WPI) adopted evaluate Molo basin. The world organization (WHO) defined ...

Water Quality plays an important role in attaining a sustainable aquaculture system, its cumulative effect can make or mar the entire system. The amount of dissolved oxygen (DO) alongside other parameters such as temperature, pH, alkalinity and conductivity are often used to estimate the water quality index (WQI) in aquaculture. There exist different approaches for the estimation of the quality...

The spatial assessments of water supply quality from wells, springs, and surface bodies were performed during the dry rainy seasons in six municipalities eastern regions Michoacán (Central Mexico). Different physicochemical parameters used to determine supplies’ Water Quality Index (WQI); all communities presented good quality. analysis indicates that many within limits set by international sta...

This paper proposes an ensemble of support vector regression and complementary neural networks to predict the Water Quality Index (WQI) for Tha Chin River, Nakhonpathom, Thailand. The data set was collected during the year 2002-2007. Four parameters are used in the prediction which are dissolved oxygen, total solid, biological oxygen demand, and suspended solid. It is found that an ensemble of ...

The objectives of this study were to investigate the seasonal and spatial variations of heavy metal pollution in the overlying water and surface sediments of the Tiaozi River, a tributary of the Liao River, which is one of the seven major rivers and one of the most heavily-polluted rivers in China. Water and sediment samples were collected over four seasons, analyzed for heavy metals (Pb, Cu, N...